Display device and method for driving the same

Abstract

The present application discloses a display device and a method for driving the display device. The display device includes a first panel, a second panel, and a light guide plate. The light guide plate is disposed between the first and second panels. The first panel includes a first display surface, and the second panel includes a second display surface. The first display surface and the second display surface are disposed on opposite sides. The first panel is an organic light-emitting panel, and the second panel is a liquid crystal panel. The organic light-emitting panel includes an organic light-emitting layer that emits white light. The white light emitted by the light-emitting layer passes through the first display surface of the first panel to display a first image of the display device. The white light emitted by the light-emitting layer passes through the light guide plate and the second display surface of the second panel to display a second image of the display device. The present application disposes a light guide plate between the organic light-emitting panel and the liquid crystal panel, and uses the organic light-emitting layer as the backlight of the liquid crystal panel, thereby achieving single-sided and double-sided display of the display device.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device and a driving method for the display device. Background Art

[0002] As people's requirements for display quality become increasingly higher, LCD panel products cannot meet the requirements of lightness, thinness, fast response and low power consumption. OLED panel (Organic Light-Emitting Diode) display technology has gradually become the mainstream display technology with its advantages such as fast response speed, wide operating temperature range, high contrast, large viewing angle, ultra-thin panel, and ability to achieve flexible display and translucent display.

[0003] A double-sided display is a device that can display images on both sides of a display device. It has a wide range of applications, including business halls in the communications, government, financial, and transportation industries; high-traffic public places such as airports, train stations, subway stations, and cafeterias; and electronic products such as digital cameras, camcorders, and mobile phones. Traditional double-sided displays typically feature two display panels positioned opposite each other, with one panel visible from each side. While this achieves a double-sided display, it essentially involves stacking two single-sided OLED panels, each requiring separate backlights. This inevitably leads to drawbacks such as large space requirements, high power consumption, and high production costs. Summary of the Invention

[0004] The purpose of the present application is to provide a display device and a driving method for the display device, which can realize single-sided and double-sided switching, reduce the power consumption of the display device, and reduce the cost of the display device.

[0005] The present application discloses a display device, which includes a first panel, a second panel and a light guide plate, wherein the light guide plate is arranged between the first panel and the second panel, the first panel includes a first display surface, the second panel includes a second display surface, and the first display surface and the second display surface are arranged as front and back sides; wherein the first panel is an organic light-emitting panel, the second panel is a liquid crystal panel, and an organic light-emitting layer emitting white light is provided in the organic light-emitting panel, the white light emitted by the light-emitting layer displays the first image of the display device through the first display surface of the first panel, and the white light emitted by the light-emitting layer displays the second image of the display device through the light guide plate and the second display surface of the second panel.

[0006] Optionally, the display device includes a first detection module and a refresh rate control module, and the first detection module is connected to the refresh rate control module; the first detection module detects the display brightness of the second panel and obtains a compensation value based on the detected brightness and the brightness of the corresponding grayscale value; the refresh rate adjustment module turns on a compensation mode based on the compensation value to adjust and compensate the display brightness of the second panel; wherein, in the compensation mode, the refresh rate corresponding to the first panel is greater than the refresh rate corresponding to the second panel.

[0007] Optionally, the display device includes a second detection module and a fill light module, the fill light module includes a light source arranged on the side of the display device, and the light source emits white light to the light guide plate; the second detection block is used to detect the brightness of the second panel, and obtain a compensation value based on the detected brightness and the brightness of the corresponding grayscale value, and the fill light module includes a brightness adjustment circuit, and the brightness adjustment circuit adjusts the luminous brightness of the light source according to the compensation value to achieve brightness compensation for the second panel.

[0008] Optionally, the display device also includes a brightness compensation switching module and a fill light module, the brightness compensation switching module is connected to the first detection module to obtain the compensation value; the fill light module includes a light source and a brightness adjustment circuit arranged on the side of the display device, and the light source emits white light to the light guide plate; the brightness compensation switching module is connected to the refresh rate adjustment module and the brightness adjustment circuit to control the refresh rate adjustment module and the brightness adjustment circuit to work respectively; the first detection module is also used to detect the brightness of the first panel; wherein, when the first detection module detects that the first panel is not luminous, the brightness compensation switching module controls the brightness adjustment circuit to adjust the luminous brightness of the light source according to the compensation value to achieve brightness compensation for the second panel; when the first detection module detects that the first panel is luminous, it controls the refresh rate adjustment module to turn on the high refresh rate mode corresponding to the first panel according to the compensation value to adjust and compensate the display brightness of the second panel.

[0009] Optionally, the first panel includes a first substrate, a second substrate, and an organic light-emitting device including the organic light-emitting layer arranged between the first substrate and the second substrate; the second panel includes a third substrate, a fourth substrate, and a liquid crystal arranged between the first substrate and the second substrate; the third substrate of the second panel is arranged on a side close to the light guide plate, and the fourth substrate of the second panel is arranged on a side away from the light guide plate; the first substrate and the fourth substrate are color filter substrates, the second substrate and the third substrate are array substrates, and the color resistance on the first substrate and the color resistance on the fourth substrate are staggered.

[0010] Optionally, a light direction control layer is provided on the side of the organic light-emitting device of the first panel close to the second panel. When the first panel is displayed and the second panel is not displayed, the light direction control layer reflects the light from the organic light-emitting layer toward the second panel back into the first panel. When the first panel is displayed and the second panel is displayed, the light from the organic light-emitting layer toward the second panel passes through the light direction control layer and enters the second panel through the light guide plate.

[0011] The present application also discloses a method for driving a display device, which is used to drive any of the above-mentioned display devices, comprising the steps of:

[0012] detecting a display mode of a display device; and

[0013] If the display mode is double-sided, a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device, and a second driving signal is generated to the second panel to drive the second panel to realize the front display of the display device; if the display mode is single-sided, a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device, or a second driving signal is generated to the second panel to drive the second panel to realize the front display of the display device;

[0014] The first panel and the second panel are arranged opposite to each other, and a light guide plate is provided between the first panel and the second panel. When the organic light-emitting layer of the first panel emits light, it serves as the light source for the first panel and the second display panel to achieve double-sided display.

[0015] Optionally, if the double-sided display mode is used, the first drive signal is generated to the first panel to drive the first panel to realize the front display of the display device, and the second drive signal is generated to the second panel to drive the second panel to realize the front display of the display device; if the single-sided display mode is used, after the step of generating the first drive signal to the first panel to drive the first panel to realize the front display of the display device or generating the second drive signal to the second panel to drive the second panel to realize the front display of the display device, the step further includes:

[0016] detecting the brightness of the second display surface of the second panel, and obtaining a compensation value according to the detected brightness and the brightness of the corresponding grayscale value;

[0017] Turning on the compensation mode according to the compensation value to compensate for the brightness of the second panel;

[0018] Wherein, in the compensation mode, the refresh rate corresponding to the first panel is greater than the refresh rate corresponding to the second panel.

[0019] Optionally, if the double-sided display mode is used, the first drive signal is generated to the first panel to drive the first panel to realize the front display of the display device, and the second drive signal is generated to the second panel to drive the second panel to realize the front display of the display device; if the single-sided display mode is used, after the step of generating the first drive signal to the first panel to drive the first panel to realize the front display of the display device or generating the second drive signal to the second panel to drive the second panel to realize the front display of the display device, the step further includes:

[0020] detecting the brightness of the first display surface of the first panel and the brightness of the second display surface of the second panel;

[0021] If the brightness of the first display panel is zero, obtaining a compensation value according to the brightness of the first display panel and the brightness of the corresponding grayscale value;

[0022] The fill light module is turned on according to the compensation value to compensate for the brightness of the second panel.

[0023] Optionally, if the double-sided display mode is used, the step of generating a first drive signal to the first panel to drive the first panel to realize front-side display of the display device, and generating a second drive signal to the second panel to drive the second panel to realize front-side display of the display device; if the single-sided display mode is used, the step of generating a first drive signal to the first panel to drive the first panel to realize front-side display of the display device, or generating a second drive signal to the second panel to drive the second panel to realize front-side display of the display device includes:

[0024] If the double-sided display mode is used, the light is controlled to pass through the control layer so that the light emitted by the organic light-emitting layer of the first panel can pass through; at the same time, a first drive signal is generated to the first panel to drive the first panel to realize the front display of the display device, and a second drive signal is generated to the second panel to drive the second panel to realize the front display of the display device;

[0025] If it is a single-sided display mode, the light control layer is controlled to be opaque, and the light emitted by the organic light-emitting layer of the first panel is reflected to the first display surface of the first panel for display, and a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device.

[0026] Compared with the existing display device scheme of stacking screens to achieve double-sided display, the present application combines an organic light-emitting panel and a liquid crystal panel to form a display device that can achieve double-sided display. While the organic light-emitting panel achieves its own light-emitting display, the organic light-emitting layer can serve as the backlight source of the liquid crystal panel. The light emitted from one side of the organic light-emitting layer is used as the display of the organic light-emitting panel, and the other side is used as the display of the liquid crystal panel, which reduces the setting of the backlight source and helps to reduce power consumption and cost. There is also a light guide plate between the two panels. The light emitted by the organic light-emitting layer can be gathered after passing through the light guide plate, thereby ensuring the display effect of the liquid crystal panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0028] Figure 1 is a schematic structural diagram of a display device according to a first embodiment of the present application;

[0029] Figure 2 is a schematic structural diagram of a display device according to a second embodiment of the present application;

[0030] Figure 3 is a schematic structural diagram of a display device according to a third embodiment of the present application;

[0031] Figure 4 is a schematic structural diagram of a display device according to a fourth embodiment of the present application;

[0032] Figure 5 is a schematic structural diagram of a display device according to a fifth embodiment of the present application;

[0033] Figure 6 2 is a schematic structural diagram of a display device (double-sided display) according to a sixth embodiment of the present application;

[0034] Figure 7 2 is a schematic structural diagram of a display device (single-sided display) according to a sixth embodiment of the present application;

[0035] Figure 8 is a flowchart of a driving method according to a seventh embodiment of the present application;

[0036] Figure 9 is a schematic flow chart of a driving method according to an eighth embodiment of the present application;

[0037] Figure 10is a flowchart of a driving method according to a ninth embodiment of the present application;

[0038] Figure 11 This is a flowchart of the driving method of the tenth embodiment of the present application.

[0039] Among them, 100, display device; 110, first panel; 111, first substrate; 112, second substrate; 113, organic light-emitting device; 114, organic light-emitting layer; 115, first display surface; 120, second panel; 121, third substrate; 122, fourth substrate; 123, liquid crystal layer; 124, second display surface; 130, light guide plate; 140, first detection module; 150, refresh rate control module; 160, brightness compensation switching module; 170, second detection module; 180, fill light module; 181, light source; 182, brightness adjustment circuit; 190, third detection module; 200, light direction control layer; R-red color resistance; G-green color resistance; B-blue color resistance. DETAILED DESCRIPTION

[0040] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative. However, the present application can be implemented in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0041] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0042] Example 1:

[0043] refer to Figure 1 As shown, as a first embodiment of the present application, a display device 100 is disclosed, which includes a first panel 110, a second panel 120 and a light guide plate 130. The light guide plate 130 is arranged between the first panel 110 and the second panel 120, the first panel 110 includes a first display surface 115, the second panel 120 includes a second display surface 124, and the first display surface 115 and the second display surface 124 are arranged on the front and back sides; wherein, the first panel 110 is an organic light-emitting panel, i.e., an OLED panel, and the second panel 120 is a liquid crystal panel, i.e., an LCD panel; an organic light-emitting layer 114 emitting white light is provided in the organic light-emitting panel, the white light emitted by the light-emitting layer displays the first picture of the display device 100 through the first display surface 115 of the first panel 110, and the white light emitted by the light-emitting layer displays the second picture of the display device 100 through the light guide plate 130 and the second display surface 124 of the second panel 120. The first picture and the second picture can be the same display picture or different display pictures.

[0044] The display device 100 in this embodiment can realize double-sided or single-sided display. The driving signals of the first panel 110 and the second panel 120 are independent of each other. The light source 181 of the first panel 110 can be shared. The organic light-emitting layer 114 can emit light from both the upper and lower sides. The light emitted from one side can be used as the light source 181 of the first panel 110 to form a front display of the display device 100. The light emitted from the other side can be used as the light source 181 of the second panel 120 to form a back display of the display device 100, thereby realizing double-sided display. In this embodiment, the light-emitting layer of the first panel 110 is mainly used as the backlight source 181 of the second panel 120. In this way, the second The panel 120 does not need to be equipped with an additional light source 181, which can save costs and reduce the thickness of the second panel 120, thereby helping to reduce the thickness of the entire display device 100; in addition, considering that when the organic light-emitting layer 114 serves as the light source 181 of the second panel 120, the light emitted by the organic light-emitting layer 114 is scattered, so a light guide plate 130 is provided to collect the light emitted by the organic light-emitting layer 114, thereby improving the light utilization rate, which is beneficial to improving the brightness of the display screen of the second panel 120, thereby improving the display effect, and avoiding the light-emitting layer of the OLED panel serving as the backlight of the LCD panel, resulting in poor display of the LCD panel.

[0045] Example 2:

[0046] like Figure 2 As shown, as the second embodiment of the present application, it is a further refinement of the above-mentioned first embodiment. The first panel 110 includes a first substrate 111, a second substrate 112, and an organic light-emitting device 113 arranged between the first substrate 111 and the second substrate 112, including the organic light-emitting layer 114. The organic light-emitting device 113 includes a cathode and an anode (not shown in the figure) arranged above and below the organic light-emitting layer 114. The second panel 120 includes a third substrate 121, a fourth substrate 122, and a liquid crystal layer 123 arranged between the first substrate 111 and the second substrate 112. The third substrate 121 of the second panel 120 is arranged on a side close to the light guide plate 130, and the fourth substrate 122 of the second panel 120 is arranged on a side away from the light guide plate 130. A polarizer is provided between the third substrate 121 and the light guide plate 130, and a polarizer is also provided on a side of the fourth substrate 122 away from the third substrate 121 (not shown in the figure).

[0047] Furthermore, the first substrate 111 and the fourth substrate 122 are color filter substrates. The first substrate 111 and the fourth substrate 122 are provided with color resists of different colors (such as RGB) and a black matrix to form a filter layer. The second substrate 112 and the third substrate 121 are array substrates. The array substrates are provided with a driving array. The driving array receives a driving signal to control the scan lines or data lines in the display panel to input a scanning signal or a data signal, etc. to charge the pixels so that the pixels display. Generally, considering that when displaying on the front and back sides, if affected by natural light, some light from the front side may pass through the first panel 110 and reach the display surface of the second panel 120, thereby affecting the display effect of the display surface of the second panel 120, the color resists on the first substrate 111 and the color resists on the fourth substrate 122 are staggered to prevent the entire display device 100 from being transparent on a certain straight line. In this way, ambient light is absorbed by the black matrix before reaching the display surface on the other side, thereby reducing the uneven brightness of certain areas caused by ambient light on the front and back sides.

[0048] The OLED panel display screen is used as the main display surface of the double-sided screen display, and the LCD panel is used as the auxiliary display surface. The two-sided display device 100 requires independent driving arrays to control the display of each pixel. This proposal proposes that the entire light source 181 of the OLED panel display be used as the backlight source 181 of the LCD panel. This can make the OLED panel display and the LCD panel display independent of each other, without the need for a one-to-one correspondence between the openings and positions between pixels. In other words, it is not necessary to use a single pixel of the OLED panel as the backlight source 181 of a single pixel of the LCD panel. Therefore, the resolution and pixel opening position of the LCD panel and the OLED panel can be designed independently, and there is no fixed positional relationship between them. Since the backlight source 181 of the LCD panel display is provided by the entire self-luminous surface of the OLED panel, in order to avoid uneven color mixing between the colors of the organic light-emitting layer 114, which causes the LCD panel backlight source 181 to be not white light, the OLED panel in this proposal needs to use a white light OLED panel, that is, the light emitted by the light-emitting layer of the OLED panel is white light and can be directly used as the backlight source 181 of the LCD panel. Since the self-luminous light from the OLED panel needs to serve as the backlight for the LCD panel, the structure below the organic light-emitting layer 114 needs to maintain high light transmittance. That is, the anode and OLED panel driver array need to be made of transparent metal. Due to the characteristics of the LCD panel pixel design, there are fewer wires in the pixel opening area, so the LCD panel driver array can be transparent or translucent. However, since only the OLED panel light source 181 serves as the backlight for the LCD panel, making the LCD panel driver array transparent can ensure maximum light utilization.

[0049] Generally, the white light OLED panel's light-emitting layer, after being affected by the electric field of the anode and cathode, emits white light. The white light is emitted in all directions. The upward light passes through the COE structure and is filtered into the corresponding color light before being emitted from the screen for normal display. The downward white light passes through the transparent anode and the OLED panel driver array to reach the light guide plate 130. Since the light intensity of the entire screen will produce regional unevenness when the OLED panel is normally displayed, the light guide plate 130 will evenly distribute the light received by the entire screen before emitting it. At this time, the light source 181 that reaches the LCD panel driver array is uniform white light. After passing through the LCD panel driver array, this white light reaches the liquid crystal side. At this time, through the control of the driver array, the display of a single LCD panel pixel can be selectively controlled. At the same time, the display grayscale is controlled according to the degree of liquid crystal deflection. The control principle is the same as that of the LCD panel. After passing through the CF substrate, the uniform white light is emitted from the screen as R / G / B monochromatic light for display.

[0050] Example 3:

[0051] like Figure 3 As shown, as the third embodiment of the present application, it is a further refinement and improvement of any of the above embodiments. The display device 100 includes a first detection module 140 and a refresh rate control module 150, and the first detection module 140 is connected to the refresh rate control module 150; the first detection module 140 detects the display brightness of the second panel 120, and obtains a compensation value according to the detected brightness and the brightness of the corresponding grayscale value; the refresh rate adjustment module turns on the compensation mode according to the compensation value, that is, turns on the high refresh rate mode corresponding to the first panel 110, so as to adjust and compensate the display brightness of the second panel 120. In the compensation mode, the refresh rate corresponding to the first panel is greater than the refresh rate corresponding to the second panel.

[0052] Since the first panel 110 and the second panel 120 use the same light source 181, the backlight of the LCD panel needs to be provided by the OLED panel. The light source 181 is actually inside the first panel 110, and the second panel 120 is a liquid crystal panel with a thickness higher than that of the first panel 110. Therefore, the light loss is also relatively large, and the display brightness is also affected by the brightness of the organic light-emitting layer 114 of the first panel 110, resulting in insufficient brightness of the second panel 120 and unable to achieve the required brightness, or when the brightness of a certain frame of the OLED panel is too dark, and the LCD panel requires high brightness accordingly, a mismatch occurs. Therefore, the OLED panel can be designed as a high refresh screen, while the LCD panel adopts a low refresh rate. The refresh rate of the first panel 110 is increased to provide the second panel 120 with higher brightness in the form of high refresh, that is, the brightness of several frames of the OLED panel is used for the display brightness of one frame of the LCD panel to compensate for the display brightness of the second panel 120, thereby effectively avoiding this problem.

[0053] In addition, if you do not want the second panel 120 to display, you can directly turn off the organic light-emitting device 113 of the second panel 120 so that the organic light-emitting layer 114 does not emit light; you can also directly disconnect the driving signal input to the second panel 120 so that the liquid crystal of the second panel 120 is in a black state and cannot display.

[0054] Example 4:

[0055] like Figure 4 As shown, as the fourth embodiment of the present application, this embodiment also takes into account the possibility of insufficient brightness of the second panel 120. Unlike the third embodiment, the display device 100 includes a second detection module 170 and a fill light module 180. The fill light module 180 includes a light source 181 disposed on the side of the display device 100, which emits white light to the light guide plate 130. The second detection block is used to detect the brightness of the second panel 120 and obtain a compensation value based on the detected brightness and the brightness of the corresponding grayscale value. The fill light module 180 includes a brightness adjustment circuit 182, which adjusts the brightness of the light source 181 according to the compensation value to achieve brightness compensation for the second panel 120. The light emitted by the OLED panel serves as the backlight source 181 of the LCD panel. Therefore, the LCD panel can only be displayed or not displayed when the OLED panel is displaying. When the OLED panel is not displaying, the LCD panel theoretically cannot display unless an alternative backlight source 181 is added. That is, when the OLED panel is not displaying, the alternative backlight source 181 can be turned on when the LCD panel needs to display.

[0056] Since the present embodiment is already provided with a light guide plate 130, an additional light source 181 is provided on the side to form an edge-entry liquid crystal display panel. The light source 181 emits white light to the light guide plate 130, thereby increasing the brightness of the light in the light guide plate 130, so that the brightness of the light coming out of the light guide plate 130 to the second panel 120 is increased, so as to solve the problem of dim brightness of the second panel 120; and when the organic light-emitting layer 114 of the first panel 110 does not emit light, the side light source 181 can serve as the backlight light source 181 of the second panel 120, thereby realizing the independent display of the second panel 120 and increasing the diversity of the display mode; this is also different from the third embodiment. Once the organic light-emitting layer 114 of the first panel 110 does not emit light, both the first panel 110 and the second panel 120 are not displayed, and the independent display of the second panel 120 cannot be realized.

[0057] Example 5:

[0058] like Figure 5As shown, as the fifth embodiment of the present application, it is a further improvement of the above-mentioned third embodiment. Different from the above-mentioned embodiments, the display device 100 also includes a brightness compensation switching module 160 and a fill light module 180. The brightness compensation switching module 160 is connected to the first detection module 140 to obtain the compensation value; the fill light module 180 includes a light source 181 and a brightness adjustment circuit 182 arranged on the side of the display device 100, and the light source 181 emits white light to the light guide plate 130; the brightness compensation switching module 160 is connected to the refresh rate adjustment module and the brightness adjustment circuit 182 to control the refresh rate adjustment module and the brightness adjustment circuit 182 to work respectively; the display device 100 also includes a third detection module 190, and the third detection module 190 is also used to detect the brightness of the first panel 110, obtain the brightness corresponding to the grayscale value of the first panel 110, and compare and generate a compensation value.

[0059] When the third detection module 190 detects that the first panel 110 is not emitting light, the brightness compensation switching module 160 controls the brightness adjustment circuit 182 to adjust the light brightness of the light source 181 according to the compensation value to achieve brightness compensation for the second panel 120; when the third detection module 190 detects that the first panel 110 is emitting light, it controls the refresh rate adjustment module to turn on the high refresh rate mode corresponding to the first panel 110 according to the compensation value to adjust and compensate the display brightness of the second panel 120.

[0060] This embodiment can be applied to different display modes. Different compensation methods can be selected in different display modes. The second panel 120 can compensate for brightness by using the high refresh rate of the first panel 110 or by using an additional side light source 181. When the first panel 110 does not need to display, only the side light source 181 can be turned on to display the second panel 120. If the first panel 110 is displayed, the side light source 181 can also be turned on for brightness compensation. However, the brightness of the light source 181 is lower than the brightness when the first panel 110 is not displayed. In this case, the light source 181 can also be turned off. Instead, the brightness of the second panel 120 is compensated by using the high refresh rate of the first panel 110. The specific compensation value is calculated by the first detection module 140 by detecting the actual brightness of the second display surface 124 and the brightness corresponding to the grayscale value. After obtaining the compensation value, a corresponding formula is generally used to calculate the specific refresh rate value of the high refresh rate of the first panel 110. Different compensation values ​​correspond to different refresh rates during high refresh. Similarly, different compensation values ​​also result in different brightness of the additional light source 181.

[0061] Example 6:

[0062] refer to Figure 6 and Figure 7 As shown, as the sixth embodiment of the present application, a light direction control layer 200 is provided on the side of the organic light-emitting device 113 of the first panel 110 close to the second panel 120. When the first panel 110 is displayed and the second panel 120 is not displayed, the light direction control layer 200 reflects the light of the organic light-emitting layer 114 toward the second panel 120 back into the first panel 110. When the first panel 110 is displayed and the second panel 120 is displayed, the light of the organic light-emitting layer 114 toward the second panel 120 passes through the light direction control layer 200 and enters the second panel 120 through the light guide plate 130.

[0063] When the OLED panel needs to display and the LCD panel does not display, the downward ambient light in the proposal is just unable to penetrate the liquid crystal, but this part of the light is equivalent to being lost. If you want to utilize the downward light in this state, you need to have a light-direction control layer 200 under the organic light-emitting layer 114 at this time, which has both total reflection and light transmittance properties. When the OLED panel displays and the LCD panel displays at the same time, the light-direction control layer 200 has a light transmittance property; when the OLED panel displays and the LCD panel does not display, the light-direction control layer 200 has a reflective property, which reflects the light emitted by the organic light-emitting layer 114 back to the first panel 110. Having such a light-direction control layer 200 can effectively utilize the light source 181 and reduce the power consumption of the OLED panel.

[0064] Example 7:

[0065] refer to Figure 8 As shown, as the seventh embodiment of the present application, a method for driving a display device is disclosed, which is used to drive the display device as described in any of the above embodiments. The driving method includes the steps of:

[0066] S1: Detecting a display mode of a display device; and

[0067] S2: If the display mode is double-sided, a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device, and a second driving signal is generated to the second panel to drive the second panel to realize the front display of the display device; if the display mode is single-sided, a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device, or a second driving signal is generated to the second panel to drive the second panel to realize the front display of the display device;

[0068] Among them, the first panel and the second panel are arranged opposite to each other, and a light guide plate is provided between the first panel and the second panel. When the organic light-emitting layer of the first panel emits light, it serves as the light source for the first panel and the second display panel to achieve double-sided display; utilizing the self-luminous characteristics of the OLED panel, a white light OLED panel is used as the display basis of the OLED panel surface, and the white light emitted by the OLED panel is used as the backlight source of the LCD panel for display; the LCD panel and the OLED panel drive arrays are independently controlled, and the pixel size and position of the LCD panel and the OLED panel may have no corresponding relationship, and each is designed independently, that is, the resolution and refresh rate are independent and designed according to actual conditions.

[0069] Example 8:

[0070] like Figure 9 As shown, as the eighth embodiment of the present application, after step S2, the following steps are further included:

[0071] S3: Detecting the brightness of the second display surface of the second panel, and obtaining a compensation value according to the detected brightness and the brightness of the corresponding grayscale value;

[0072] S4: starting a compensation mode according to the compensation value to compensate for the brightness of the second panel;

[0073] Wherein, in the compensation mode, the refresh rate corresponding to the first panel is greater than the refresh rate corresponding to the second panel.

[0074] When the brightness of a certain frame of the OLED panel is too dark, and the LCD panel requires high brightness accordingly, a mismatch occurs. Therefore, the OLED panel can be designed as a high refresh screen, while the LCD panel adopts a low refresh, that is, the brightness of several frames of the OLED panel is used for the display brightness of one frame of the LCD panel. The first detection module detects the display brightness of the second panel and obtains a compensation value based on the detected brightness and the brightness of the corresponding grayscale value; the refresh rate adjustment module turns on the high refresh rate mode corresponding to the first panel according to the compensation value to adjust and compensate the display brightness of the second panel.

[0075] Example 9:

[0076] like Figure 10 As shown, as the ninth embodiment of the present application, after step S2, the following steps are further included:

[0077] S5: Detecting the brightness of the first display surface of the first panel and the brightness of the second display surface of the second panel;

[0078] S6: If the brightness of the first display panel is zero, obtaining a compensation value according to the brightness of the first display panel and the brightness of the corresponding grayscale value;

[0079] S7: Turning on the fill light module according to the compensation value to compensate for the brightness of the second panel.

[0080] The light emitted by the OLED panel serves as the backlight source of the LCD panel. Therefore, the LCD panel will only be in a display or non-display state when the OLED panel is displaying. When the OLED panel is not displaying, the LCD panel is theoretically unable to display unless an alternative backlight source is added. That is, when the OLED panel is not displaying, the LCD panel can turn on the alternative light source when it needs to display. The second detection block is used to detect the brightness of the second panel, and obtain a compensation value based on the detected brightness and the brightness of the corresponding grayscale value. The fill light module includes a brightness adjustment circuit, and the brightness adjustment circuit adjusts the luminous brightness of the light source according to the compensation value to achieve brightness compensation for the second panel.

[0081] In different display modes, different compensation methods can be selected. The second panel can perform brightness compensation through the high refresh of the first panel, or it can perform brightness compensation through an additional side light source. When the first panel does not need to be displayed, the side light source can only be turned on to realize the display of the second panel. If the first panel is displayed, the side light source can also be turned on for brightness compensation, but the brightness of the light source at this time must be lower than the brightness when the first panel is not displayed. At this time, you can also choose not to turn on the light source, but to compensate for the brightness of the second panel through the high refresh of the first panel. The specific compensation value is obtained by the first detection module by detecting the actual brightness of the second display panel and the brightness corresponding to the grayscale value. After obtaining the compensation value, there is generally a corresponding formula to calculate the specific refresh rate value of the high refresh of the first panel. The refresh rate corresponding to the high refresh of different compensation values ​​is also different. Similarly, the brightness of the additional light source is also different when the compensation value is different.

[0082] Example 10:

[0083] like Figure 11 As shown, as the tenth embodiment of the present application, step S2 includes the steps of:

[0084] S21: If the double-sided display mode is selected, controlling the light to pass through the control layer so that light emitted by the organic light-emitting layer of the first panel can pass through; generating a first drive signal to the first panel to drive the first panel to realize front-side display of the display device, and generating a second drive signal to the second panel to drive the second panel to realize front-side display of the display device;

[0085] S22: If it is a single-sided display mode, the light control layer is controlled to be opaque, and the light emitted by the organic light-emitting layer of the first panel is reflected to the first display surface of the first panel for display, and a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device.

[0086] When the first panel is displayed and the second panel is not displayed, the light direction control layer reflects the light from the organic light emitting layer toward the second panel back into the first panel. When the first panel is displayed and the second panel is displayed, the light from the organic light emitting layer toward the second panel passes through the light direction control layer and enters the second panel through the light guide plate. When the OLED panel needs to display and the LCD panel does not display, the downward ambient light in the proposal is simply unable to penetrate the liquid crystal, but this is equivalent to the loss of this part of the light. If you want to achieve the use of the downward light in this state, you need to have a functional layer under the organic light emitting layer at this time, that is, this functional layer needs to have both total reflection and light transmittance properties. When the OLED panel displays + the LCD panel displays, the functional layer has light transmittance; when the OLED panel displays + the LCD panel does not display, the functional layer has reflection properties. Having such a functional layer can effectively utilize the light source and reduce the power consumption of the OLED panel.

[0087] It should be noted that the limitations on the various steps involved in this solution do not limit the order of the steps without affecting the implementation of the specific solution. For example, detecting the status of the display device and detecting the display mode of the display device can be detected simultaneously, or the status of the display device can be detected first and then the display mode of the display device, or the display mode of the display device can be detected first and then the status of the display device. That is, the steps written in front can be executed first, or can be executed later, or can even be executed at the same time. As long as this solution can be implemented, it should be deemed to fall within the scope of protection of this application.

[0088] It should be noted that the inventive concept of this application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the various embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the various embodiments or technical features are combined, the original technical effects will be enhanced.

[0089] The above content is a further detailed description of the present application in conjunction with specific optional implementation methods, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, they can make several simple deductions or substitutions without departing from the concept of the present application, which should be considered to fall within the scope of protection of the present application.

Claims

1. A display device, characterized in that: The device comprises a first panel, a second panel and a light guide plate, wherein the light guide plate is arranged between the first panel and the second panel, the first panel comprises a first display surface, the second panel comprises a second display surface, and the first display surface and the second display surface are arranged in front and back faces; The first panel is an organic light-emitting panel, and the second panel is a liquid crystal panel. The organic light-emitting panel is provided with an organic light-emitting layer that emits white light. The white light emitted by the light-emitting layer is transmitted through the first display surface of the first panel to display the first image of the display device. The white light emitted by the light-emitting layer is transmitted through the light guide plate and the second display surface of the second panel to display the second image of the display device. The display device includes a first detection module and a refresh rate control module, wherein the first detection module is connected to the refresh rate control module; The first detection module detects the display brightness of the second panel and obtains a compensation value according to the detected brightness and the brightness of the corresponding grayscale value; the refresh rate adjustment module activates a compensation mode according to the compensation value to adjust and compensate the display brightness of the second panel; Wherein, in the compensation mode, the refresh rate corresponding to the first panel is greater than the refresh rate corresponding to the second panel.

2. The display device according to claim 1, wherein The display device includes a second detection module and a fill light module. The fill light module includes a light source arranged on the side of the display device, and the light source emits white light to the light guide plate. The second detection module is used to detect the brightness of the second panel and obtain a compensation value based on the detected brightness and the brightness of the corresponding grayscale value. The fill light module includes a brightness adjustment circuit. The brightness adjustment circuit adjusts the luminous brightness of the light source according to the compensation value to achieve brightness compensation for the second panel.

3. The display device according to claim 1, wherein The display device further includes a brightness compensation switching module and a fill light module, wherein the brightness compensation switching module is connected to the first detection module to obtain the compensation value; The fill light module includes a light source and a brightness adjustment circuit arranged on the side of the display device, and the light source emits white light to the light guide plate; The brightness compensation switching module is connected to the refresh rate adjustment module and the brightness adjustment circuit to control the refresh rate adjustment module and the brightness adjustment circuit to work respectively; The display device further includes a third detection module, wherein the third detection module is used to detect the brightness of the first panel; Among them, when the third detection module detects that the first panel is not emitting light, the brightness compensation switching module controls the brightness adjustment circuit to adjust the luminous brightness of the light source according to the compensation value to achieve brightness compensation for the second panel; when the third detection module detects that the first panel is emitting light, it controls the refresh rate adjustment module to turn on the high refresh rate mode corresponding to the first panel according to the compensation value to adjust and compensate the display brightness of the second panel.

4. The display device according to any one of claims 1 to 3, wherein: The first panel includes a first substrate, a second substrate, and an organic light-emitting device including the organic light-emitting layer disposed between the first substrate and the second substrate; the second panel includes a third substrate, a fourth substrate, and liquid crystal disposed between the first substrate and the second substrate; the third substrate of the second panel is disposed on a side close to the light guide plate, and the fourth substrate of the second panel is disposed on a side away from the light guide plate; The first substrate and the fourth substrate are color filter substrates, the second substrate and the third substrate are array substrates, and the color resist on the first substrate and the color resist on the fourth substrate are staggered.

5. The display device according to claim 4, wherein A light direction control layer is provided on the side of the organic light-emitting device of the first panel close to the second panel. When the first panel is displayed and the second panel is not displayed, the light direction control layer reflects the light from the organic light-emitting layer toward the second panel back into the first panel. When the first panel is displayed and the second panel is displayed, the light from the organic light-emitting layer toward the second panel passes through the light direction control layer and enters the second panel through the light guide plate.

6. A method for driving a display device, for driving the display device according to any one of claims 1 to 5, characterized in that: Including steps: detecting a display mode of a display device; as well as If the display mode is double-sided, a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device, and a second driving signal is generated to the second panel to drive the second panel to realize the front display of the display device; If the display mode is single-sided, a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device, or a second driving signal is generated to the second panel to drive the second panel to realize the front display of the display device; The first panel and the second panel are arranged opposite to each other, and a light guide plate is provided between the first panel and the second panel. When the organic light-emitting layer of the first panel emits light, it serves as the light source for the first panel and the second display panel to achieve double-sided display.

7. The driving method according to claim 6, wherein: If the double-sided display mode is used, a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device, and a second driving signal is generated to the second panel to drive the second panel to realize the front display of the display device; If it is a single-sided display mode, after the step of generating a first driving signal to the first panel to drive the first panel to realize the front display of the display device or generating a second driving signal to the second panel to drive the second panel to realize the front display of the display device, the step further includes: detecting the brightness of the second display surface of the second panel, and obtaining a compensation value according to the detected brightness and the brightness of the corresponding grayscale value; Turning on the compensation mode according to the compensation value to compensate for the brightness of the second panel; Wherein, in the compensation mode, the refresh rate corresponding to the first panel is greater than the refresh rate corresponding to the second panel.

8. The driving method according to claim 6, wherein: If the double-sided display mode is used, a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device, and a second driving signal is generated to the second panel to drive the second panel to realize the front display of the display device; If it is a single-sided display mode, after the step of generating a first driving signal to the first panel to drive the first panel to realize the front display of the display device or generating a second driving signal to the second panel to drive the second panel to realize the front display of the display device, the step further includes: detecting the brightness of the first display surface of the first panel and the brightness of the second display surface of the second panel; If the brightness of the first display panel is zero, obtaining a compensation value according to the brightness of the first display panel and the brightness of the corresponding grayscale value; The fill light module is turned on according to the compensation value to compensate for the brightness of the second panel.

9. The driving method according to any one of claims 6 to 8, wherein: A light direction control layer is provided on a side of the organic light-emitting device of the first panel close to the second panel. If the double-sided display mode is used, a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device, and a second driving signal is generated to the second panel to drive the second panel to realize the front display of the display device; If the single-sided display mode is used, the steps of generating a first driving signal to the first panel to drive the first panel to realize front-side display of the display device or generating a second driving signal to the second panel to drive the second panel to realize front-side display of the display device include: If the double-sided display mode is used, the light is controlled to pass through the control layer so that the light emitted by the organic light-emitting layer of the first panel can pass through; at the same time, a first drive signal is generated to the first panel to drive the first panel to realize the front display of the display device, and a second drive signal is generated to the second panel to drive the second panel to realize the front display of the display device; If it is a single-sided display mode, the light direction control layer is controlled to be opaque, and the light emitted by the organic light-emitting layer of the first panel is reflected to the first display surface of the first panel for display, and a first driving signal is generated to the first panel to drive the first panel to realize the front display of the display device.

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